Ecological Relationships LE

Base your answer(s) to the following question(s) on the key below and on your knowledge of biology.

A small shrimp feeds on parasites on the skin of a marine fish. Which set of symbols represents the relationship between the fish and the other two organisms? 

• + with shrimp; - with parasite

• - with shrimp; 0 with parasite

• 0 with shrimp; - with parasite

• + with shrimp; 0 with parasite

When populations of different species occupy the same area at the same time, these populations form a

• community

• phylum

• biome

• succession

The wrasse, a small marine fish, periodically cleans harmful parasites from the mouth and body of the moray eel. The moray, in turn, protects the wrasse from larger predators and provides it with a constant supply of food. This is an example of the type of relationship known as

• mutualism

• parasitism

• commensalism

• saprophytism

All the cotton tail rabbits in a country would represent

• a community

• a biome

• a population

• an ecosystem

Which relationship is illustrated by a tapeworm living in the intestine of a human?

• commensalism

• predator-prey

• mutualism

• parasite-host

Which is a biotic factor operating within an ecosystem?

• the type of climate in a given region

• the carnivores that consume other animals

• the amount of helium gas in the air

• the rate of flow of water in a river

Which organism would most likely have a predator-prey relationship?

• tapeworm and dog

• barnacle and whale

• hawk and mouse

• rabbit and grass

Which is an example of an abiotic factor in a pond environment?

• the water

• a frog

• a grasshopper

• a snake

A flea in the fur of a mouse benefits at the mouse's expense. This type of relationship is known as

• commensalism

• parasitism

• saprophytism

• mutualism

Which list includes only abiotic factors?

• soil, water, air and sunlight

• ducks, fish, soil, and water

• humidity, temperature, rodents, and grasses

• trees, flowering plants, mosses, and ferns